SDL_rtf: CI: linux workflows to run under ubuntu-latest.

SDL Commits
1 
From 1db920c00d0662db2186e5ce7f442e3432c29bf4 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Tue, 8 Apr 2025 18:40:10 +0300
Subject: [PATCH] CI: linux workflows to run under ubuntu-latest.

---
 .github/workflows/main.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index f777743..df307d4 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -18,8 +18,8 @@ jobs:
         - { name: Windows (MSVC+CMake),         os: windows-latest, shell: sh,   cmake: '-DPerl_ROOT=C:/Strawberry/perl/bin/ -GNinja', msvc: 1, shared: 1, static: 0 }
         - { name: Windows (mingw64+CMake),      os: windows-latest, shell: 'msys2 {0}', msystem: mingw64, msys-env: mingw-w64-x86_64, shared: 1, static: 0,
             cmake: '-G "Ninja Multi-Config"' }
-        - { name: Linux,                        os: ubuntu-20.04,   shell: sh,   cmake: '-GNinja', shared: 1, static: 0 }
-        - { name: 'Linux (static)',             os: ubuntu-20.04,   shell: sh,   cmake: '-GNinja -DBUILD_SHARED_LIBS=OFF', shared: 0, static: 1 }
+        - { name: Linux,                        os: ubuntu-latest,  shell: sh,   cmake: '-GNinja', shared: 1, static: 0 }
+        - { name: 'Linux (static)',             os: ubuntu-latest,  shell: sh,   cmake: '-GNinja -DBUILD_SHARED_LIBS=OFF', shared: 0, static: 1 }
         - { name: Macos,                        os: macos-latest,   shell: sh,   cmake: '-GNinja', shared: 1, static: 0 }
 
     steps: